Asus B121 Stylus Input

[OSTexo]

Hello,

I am attempting to use Sandboxie with an Asus B121 Slate PC

* Sandboxie 3.70 64 bit

* Windows 7 64 bit

I am unable to use the stylus in the sandbox. The usual behavior is when I select a text box a small icon appears to indicate that the writing input box is available. When in a sandbox, for example Firefox, the box doesn't show up, and when l manually open the box from the left hand side of the screen and write in the handwriting panel I can write in the panel but the insert button is greyed out. I'm guessing this is a problem with Sandboxie doing its job and not allowing a Windows process to run? The tablet is a dual touch and Wacom slate, with similar hardware to the Asus EP121. Thoughts? Thanks.